Chimney and smokestack ventilator



Dec. 7 1926.

A. H. CAMPBELL;

GHIMNET! AND SMOKESTACK VENTILATOR Filed May 7, 1925 Patented Dec. 7, 1926.

UNITED STATES PATENT OFFICE.

CHIMNEY AND -S11/[CKESTACK VENTILATOR.

Application filed May 7,

rIhis invention relates to chimney or smokestack ventilators and has special reference to improvements in the ventilator shown and described in my prior patent for chimney or smoke stack ventilator, No. 1,476,488, issued December 4, 1923.

The principal object of the present invention is to provide an improved ventilator for the purpose described wherein the manual turning means used in the prior invention will be eliminated, proper positioning of the ventilator with respect to air currents or wind being produced automatically.

lVith the above and other objects in view as will be hereinafter apparent, the invention consists in general of certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed.

In the accompanying` drawings like characters of reference indicate like parts in the several views, and:

Figure 1 is a perspective view of the improved ventilator.

Figure 2 is a plan view of the device.

Figure 3 is a vertical sectionthrough the lower part of the ventilator.

The present invention consists of two distinct parts. the support and the rotating shield member.

The body of the support may be the top part of a smokestack or chimney pipe and consists of a cylindrical pipe across the upper end of which extends a cross bar 11 having downwardly turned ends 12 which extend within the pipe 10 and are riveted or otherwise secured thereto. Depending from the center of this strap is a tubular bearing 13, the strap having a central opening alined therewith.

The shield member is provided with a lower cylindrical base portion 14 which surrounds the pipe 10 in spaced relation thereto. Projecting upwardly from the top edge of the base is a substantially semi-cylindrical 1926. Serial N0. 107,455.

shield 15 having its upper edges curved as at 16. Extending across the top of the base 14 is a strap 17 having downwardly turned ends 18 projecting within the base and riveted or otherwise suitably secured thereto. Passing through the center of the strap 17 is the upper end of a pivot pin or shaft 19 which is held in position by a nut 20.

'At 21 is a rudder or vane which has at its lower edge a shank 22 provided with a laterally bent end 23 riveted or otherwise iixed to the inner side of the top of the shield at the center thereof, the vane thus extending above the shield and being positioned diametrically of the base 14.

th this construction the wind will always turn the shield so thatit lies in front of the pipe 10 and any eddy current flowing over the top of the shield will have all tendency to downward iiow resisted by upward air currents flowing through the space between the pipe and base portion.

There has thus been provided a simple and eicient device of the kind described and for the purpose specified.

Having thus described the invention, what is claimed as new, is:

In a ventilator. of the kind described, a supporting member comprising a pipe, a strap extending across said pipe, and a tubu-fV lar bearing supported by said strap; in combination with a shield member including a cylindrical base portion surrounding the pipe in spaced relation thereto, a shield extending upwardly from the upper edge of the base portion, a strap extending across the base portion, a journalpin extending downwardly from the strap and fitting said bearing, a rudder or vane, and a shank extending horizontally from the lower edge of the vane and having a laterally bent end secured to the inner .side of the top of the shield at the center thereof.

In testimony whereof I aiiix my signature.

AUSTIN H. CAMPBELL. 

